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w. B. TROST AND F. KLEIN.

SECTIONAL SILO LADDER.

APPLICATION HLED APR.20. 1918.

1 308,881 Patented July 8, 1919.

l .54 i fi v z? y LLdLw W Fig. J. Fi 3 INVENTORS William E. Trcwt andFra nk 7526 i n,

ATTORNEY THE COLUMBIA PLANOGRAPH cm, WASHINGTON, D, C.

UNITED STATES PATENT OFFICE.

WILLIAM B. TROS'I AND FRANK KLEIN, 0F WATERLOO, IOWA, ASSIGNORS TO WATERLOO-PLAYFORD SIIJO COMPANY, OF WATERLOO, IOWA, A CORPORA- TION OF IOWA.

Application filed April 20, 1918. Serial No. 229,738.

To all whom it may concern:

Be it known that we, WILLIAM B. Tnos'r and FRANK *KLEIN, citizens of the United States of America, and residents of Water-v loo, Blackhawk county, Iowa, have invented permit any section to. be swung up out of the way of a door-opening over which it is suspended, and" retained'in such upward position by the gravity of the superposed section placed toengage it.

This object we have accomplished the means which are hereinafter described and claimed, and which are illustrated in the accompanying drawings, in which Figure 1 is an elevation of part of a silo which includes the vertical range of doors therein, showing sections of our ladder mounted over said doors in vertical alinement; Fig. 2 is a transverse vertical section of the parts shown in said Fig. 1, taken on the broken line 2-2 of said figure, looking in the direction indicated by the arrow, and Fig. 3 is a perspective view of one section of said ladder.

As shown the sections of our improved sectional ladder are mounted over the vertically ranged doorways of a silo, but may be positioned on any other part of the silo,

. or any other kind of building or structure,

without departing from the principle of the invention, which is not dependent uponlocation of the sections, nor their respective forms, dimensions or materials.

Our ladder sections are particularly employed on silo structures, and supported over the door-openings thereof, for convenience. We have shown in said Fig. 1, therefore, only the pair of vertical side-beams or jambs 8 which inclose a plurality of vertically ranged door-openings closed by the usual solid doors 10. The jamb-timbers 8 are connected by means of cross-beams 9 to form said door-openings. The numeral 6 denotes several rods which surround the silo structure in a well-known way to support its Specification of Letters Patent.

SECTIONAL SILO-LADDER.

Patented July 8, 1919.

Walls, and whose ends are adjustably connected by ,means of adjusting devices 7 The ladder sections are alike in form and dimensions, andcomprise for each a pair of spaced parallel vertical side-bars 1 rigidly connected at the bottom and near the top by means of the cross-bars 3 and 2 respectively. The bottom bar '3 has its opposite extremities bent in one direction for a purpose to be described.

The numeral t denotes a pair of'clips or hooks, formed of a single piece'of bar metal in each instance, suitably bent as shown to have'a fiat hook and a shank,'the shank.

being transversely orificed, whereby it may be pivotallymounted upon the-*orificed upper end of the abutting side-bar 1 by means of a rivet or pivot-bolt 5.

Referring now to said Fig. 2, it will be seen that the hooks 4 are suspended upon the cross-rods 6, opening outwardly, the-flat middle part of the hook in each case depending and lying adjacent to or contacting with a part of the underlying beam 9, the

side-bars 1 being held suspended in spaced relation to the outer wall of the silo or over the door thereof which is immediately thereunder, with the ends of thebar-extremr' ties or arms 3 engaging said door. When vertically alined in this way, the said sections serve as a sectional ladder. Being suspended over the doors 10, it often becomes necessary to have a doorway free from obstruction, when the door has been swung inwardly, and this iseasily accomplished, by swinging up the ladder section immediately above the door-opening to be cleared, to permit the section which overhangs said opening to be itself swung upwardly under the first-mentioned section and over against the door above, the upper section when dropped then retaining the secondsection and preventing it from dropping back to its first position. A reversalof said process places the related sections in their firstpositions.

The sections are easy to suspend, operate or remove, are strong, simple and inexpensive.

Havingdescribed our invention, what we claim as new, and desire to secure by Letters Patent, is:

L The combination with silo hoops or the its upward position bythe overlying ladder section thereabove.

2. The combination with silo hoops 01 mg" like, of ladder sections positioned one above another, eachsection being composed of a frame and suspending-means "pivoted thereto, said suspending-means being hung detachably on said silo-h0ops, the' fraine-p'arts of the sections being adapted to swing ups wardly to be receivedback of the sectionfraine immediately thereabove' after the latter" has first been swungnpwardly to clear it, the frame above then holding-the frame below'in its raised position; v

- 3. The combination with silohoop's orthe like, of ladder-"sections positioned one-aibove another, each section being composedofa frame andsuspending-means pivoted thereto," said" suspending-means being hung de tachably on said silo-hoops, the -,f-ra1'neparts of'the sections being adapted'to sWinga-up wardl-y to -be'*received backof the sectionfranie immediately- -threabove and-- held in its raised position-Rbythe gravity--- and encopes-mums pat'ent anay beohtained-ztor-fivefcents each, by addressing tirefifloniiii issionervoLl'ateiiti;

gagement of the latter, each .sectionframe having spacing ineans n ounted on; its lower part to hold it spaced apart from the silo.

4. The combination with a structure having a plurality fv of 'verticallyarran'ged dooropenings, of movable-closures for said openings, supporting-means fixed "above each door-opening, and ladder-sections arranged vertically above one another with a section aboveeach' door-opening, each sectionbeing composed ofsid'e-bars fixedly connected by means of cross-rungs of which one rung has parts projecting inwardly toward the 'doorclosure thereunder to space the section therefrom, and hooks :pivo'ted toi the upper ends of said side-bars and hung over said suspend ing-meansrenrovably: and having: shanks extendingoutwardly, said shanks spacing the upper parts of the {section's frointhe silo, and permitting the sections to be swung upwardly-,uwith' the raised section 1 retained under thensection above-it by: engagement therewith r and thegravity got the latter, to clear the door-opening beneath the' raised section.- I -i I Signed at Waterloo," Iowa, this 4th dayof April, 1918.- Y i WILLIAM'B.

ERA'NK KLEINQ wai h ingto qlc n p j 

